Answer:
A
Explanation:
the first balloon starts at 3,000 and goes down 40 so this would make it a negative 40 so 3,000-40 but it does this every minute so 3,000-40m
the second balloon is going up starting at 1,200 and going up by 50 so positive 50 this would be 1,200+50 and it does this every minute so 1,200+50m